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Starting Problem, continued 200 1986

posted by  dave-ed on  Mon Oct 25 16:06 CST 2004
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1a) I got the harness from a reputable Volvo dismantler, it is a newer dealer replacement harness from a wrecked 86 volvo. I didn't receive instructions with it. I marked the connectors and layed both harnesses on the floor and labled the harness that I was going to install in the car. All the connectors matched, I didn't have to re-work any of the connectors.

I haven't been able to locate the Bently Manual but refered to the diagrams on the CD and the manual I received from the library. The harness has three ground points that connect to the intake manifold. I cleaned up all of the points where the ground wires bolted to the manifold. I also checked the ground strap that connects to the alternator to make sure that it had clean connections.

I substituted the missing ECU ground with the free end of a grounded wire placed into the back of the relay harness plug at 86/2 so it makes contact with the Blue/Green wire terminal.The fuel relay closed, the fuel pumps ran when the key was turned on and we got 12 volts to terminal 85. I have checked all of the harness connectors they are clean and tight.

A little background information: I got the car and it wouldn't start it just clicked. I looked at the old harness it had a britle wires and a few wires that had the copper wires showing, and a few that were broken completely. The insulation was flaking off in many places. I thought this was the reason that the car wouldn't start, I replaced the harness and the positive battery cable end as it was corroded. The car cranks but will not start. Thanks again, David..











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